By Scott Martin - @RaceWx4You
Click on images to enlarge.
It's a championship-quality forecast for the final weekend of the season for the Verizon Indycar Series, as they visit the majestic Sonoma Raceway. Mornings will start off cool each day, but maximum sunshine will allow the temperatures to climb nicely to near 80 degrees each day. Wind will not be an issue for Friday and Saturday, but will be picking up to 10 MPH by Sunday afternoon. We won't even mention rain in this forecast.
For much of the week I thought that the remnants of Harvey would be swept out of here before the race weekend at Watkins Glen for the Verizon Indycar Series, but the forecast has changed drastically today.
Saturday will not be too bad at the track with partly cloudy skies throughout much of the day. Morning temperatures will start off pretty chilly and may bring a slight delay to morning on-track activities, but it will warm quickly into the mid 60s for the high. There is a very slight chance of a shower passing over the track after the noon hour, but the better rain chance will come during the late afternoon and early evening hours.
Sunday will be a pretty soggy day for the track, especially during the morning and into the early afternoon hours. It will be quite breezy at times as well, as the surface low formerly known as Harvey, passes nearby to the track. We do not expect any severe weather or lightning at this time, but definitely keep posted to the weather conditions through the day. Rain coverage should diminish for the mid-afternoon through the early evening hours, and maybe we can get a dry track for a little while. Afternoon highs will top out in the upper 60s.
Not much change in the forecast for the Bommarito Automotive Group 500 at Gateway Motorsports Park...
Great weather throughout the afternoon hours, with mostly sunny skies and highs in the lower 80s. That is how it will be for the first practice session at 4PM. Qualifying temperatures will be down in the mid to upper 70s, and final practice temperatures at 9PM will be in the lower 70s and dropping into the upper 60s by the end of the session.
Almost a near repeat of Friday's weather... Sunny skies throughout the day with temperatures topping out in the lower 80s. Temperatures will be dropping down into the mid 70s by the start of the main event at 8PM, and down into the lower 70s by the end of the race around the 10PM hour.
Not much change has been needed to the forecast I made on Monday, as I'm still expecting nice weather for the ABC Supply 500 on Sunday.
A cold front will move across the area on Friday, which will bring a good chance of storms that day. More stable air will build in at the surface behind the front, but an upper level trough will lag behind it and keep a slight chance of showers going into Saturday. There is a possibility of some isolated light showers around the track for the final practice session late in the day, but the showers should be so sparse and short-lived that I don't expect much, if any, impact. I think the timing of possible showers favors the late afternoon and evening hours, mainly 4 pm or later.
The models differ on how fast the trough will exit, and there may continue to be some showers into Saturday night. But I'm confident that any chance of showers will be gone by sunrise. Race day will be mostly sunny with pleasant temperatures in the upper 70s, and a northwest wind at 5 to 10 mph. Overall, a great day to be at the track.
Overall, the forecast looks favorable for a nice weekend of IndyCar racing at Pocono Speedway. Hopefully this forecast will hold up as we get closer to the weekend.
There will be a good chance of showers and thunderstorms in the area on Friday, and a cold front is expected move through on Friday night. The upper level trough is delayed a little behind the front, which is why I've included a slight chance of showers on Saturday. A dry day is most likely, but I can't entirely rule out an isolated shower until the trough exits the area on Saturday night.
As the trough exits, dry air aloft will build into the region from the northwest, along with surface high pressure. This should provide a nice day for the race on Sunday. There should be a good amount of sunshine, and temperatures will be pretty comfortable too, with highs in the mid 70s.
Unless there's a major shift in the forecast, I should have another update posted on Wednesday afternoon.
By Doug Schneider
Showers are moving across Ohio today ahead of an approaching surface low pressure system and a cold front. The surface low and front will be southeast of the area by Friday morning, but the upper level trough will lag behind. This is what will keep a chance of showers going at Mid-Ohio on Friday.
I am keeping the chance of rain at 40% today because I do not believe that the entire day will be a washout. There should still be plenty of on-track activity, so I have the Impact Forecast at Low. The most likely time period for rain at the track appears to be in the late morning to early afternoon hours, mainly between 10 am and 3 pm. Looking at the event schedule, the rain may affect IndyCar practice, PWC practice, USF2000 Race 1, and Indy Lights qualifying. But it won't be raining through all those activities - I expect scattered coverage of on/off showers. Thunderstorms are possible, but they should be few and far between. Rain amounts are most likely to be around a tenth of an inch, but up to a quarter inch may be possible if a thunderstorm happens to directly cross over the track.
Behind the exiting trough, high pressure will be building across the Great Lakes region on Saturday. A brisk northerly flow will keep temperatures relatively cool all day, with highs in the mid 70s. A north wind will be blowing between 10 and 20 mph, with gusts to near 25 mph at times, so pin down your tents and lawn chairs.
Sunday looks absolutely perfect for racing - highs in the upper 70s with plenty of sunshine. North winds will be a little lighter on Sunday, between 10 and 15 mph.
I'm putting out an update earlier than planned today because the models have shifted the chance of rain into Friday for Mid-Ohio today. The cold front that will bring numerous showers and thunderstorms on Thursday is still expected to move across the area on Thursday night, but the upper level trough will lag behind it, and keep a chance of showers into Friday. With the models showing the upper trough over Ohio on Friday, this will create some instability that will generate scattered showers. The showers could affect the track at any time of the day. At this time, the showers should be light, with perhaps at tenth of an inch of rain expected.
The rest of the weekend still looks great, with pleasant temperatures in the 70s and lots of sunshine. Saturday will be breezy behind the departing low pressure system, with gusts around 20 mph at times.
The weather looks great at Mid-Ohio this weekend for IndyCar, MRTI, and Pirelli World Challenge racing. While the practice day on Thursday will likely have showers and storms, the rest of the event is expected to stay dry with comfortable temperatures and humidity levels.
A cold front will be approaching Ohio from the northwest on Thursday, There is some uncertainty about the timing details of the storms ahead of the front, so at this point I can't be too specific about it, and there could be showers at any time of the day. The cold front will move through Thursday night, and all the rain will be out of the area by the time cars hit the track on Friday morning.
Behind the cold front, high pressure will settle into the Great Lakes region while a low pressure system will be east of the Appalachians, and this pattern will remain nearly stationary through the weekend. This will provide a north to northeasterly flow across Ohio that will keep temperatures and humidity levels very comfortable. High temperatures each day will be between 75 and 80, with low temperatures around 60. There will be a steady northeast breeze of 10 to 15 mph each day.
Unless there is a major change in what the models are showing, which I doubt, my next forecast update will likely be posted on Wednesday.
First of all, I want to say a big "thank you" to you, the site regulars, for being patient on forecast updates. In my home state of Alabama, the weather has been quite active with the remnants of Tropical Storm Cindy moved onshore and now has moved off to the east coast. Rainfall amounts over the past 3 days have been incredible, with most in our state receiving over four inches, with some nearing the ten inch mark. We have also had our share of destruction, with an EF-2 tornado touching down just a few miles down the road from my location. Today I woke up relieved because I knew there would be no severe threat for me today, even with rain falling at this moment. Now let's get to the forecast.
The above image is the latest HRRR model run showing the simulated radar valid at 1PM. On this model run, this is when the most active weather will be going on across Wisconsin today. The good news is that most of the activity stays well to the north of Road America. The bad news is that there will be some scattered activity around the area. Now I do not believe that the coverage of rainfall will be as great as it shows in the model, but I think that a passing shower is possible at the track. Skies will be mostly cloudy throughout the day, and winds will be quite breezy out of the northwest at 10-15 MPH, gusting to 25 MPH at times. I'm only going with a 20% rain chance today, as the model shows much of the day being dry at the track.
There will be a line of showers and storms pushing through the area after 7PM, but I think most of the action will go south of the track. There will be a good chance of rain falling though, so campers may have to find some shelter for a little while. There may be some thunder, but nothing strong or severe is expected.
I'm going with an almost completely dry forecast for Sunday as of now. Looking at the latest model trend, there will be more showers and storms forming throughout the afternoon hours, but most, if not all, of the activity will stay west of the track until after 5-7PM tomorrow evening. Skies will be partly sunny, and winds will be out of the west-northwest at 10-15 MPH. I'm going with a 20% rain chance because I do believe it will stay dry at the track, but a stray shower is possible.
Radar is up and running on the website, so please feel free to take a look at anytime throughout the weekend. Have a great weekend!
The weekend forecast for Road America at this point doesn't look too bad, but we may have to put up with a little wet stuff at some points throughout the event. Believe it or not, the tropical system that is affecting the Gulf Coast is messing with the forecast, so some of the details are not set in stone as of yet. I'll nail those down within the next day or two.
There is a surface boundary that is forecast to stall out over the Wisconsin/Illinois border, and this may bring showers and thunderstorms to the area on Thursday, especially during the afternoon hours. There is a possibility that the weather on Wednesday could make the storms form farther to the south on Thursday, we'll just have to wait and see on that part. By Friday, all of the shower activity will have moved out of the area, and the day is setting up to be nice and dry with mild temperatures.
We'll have a slightly active weather pattern setting back up over the area for Saturday as troughing starts to form and begins to move near the area. This will allow several waves to move through the area, but as of now, rain chances will be small and mainly during the afternoon hours. Same story on Sunday, but rain chances will be even smaller, and I wouldn't be surprised if I will be able to remove those rain chances out of the forecast within the next day or two.
Bottom line: We'll mention the chance of rain on both Saturday and Sunday, but more than likely it will stay dry at the track. I'll have a really good idea by Wednesday night on what the weather will hold for us at Road America.
By Doug Schneider
The weather still looks good overall for IndyCar's visit to Texas Motor Speedway this weekend, but I have added just a slight chance of a storm on Friday with today's forecast update.
In my post on Monday, I mentioned some uncertainty about the rain chances on Friday. That chance looks slightly higher today, due to a little more moisture and instability that could be present, and a weak upper level disturbance. But I still think that it is highly likely (around an 80% chance) that all racing activities will be held without any weather issues on Friday. Saturday continues to look dry, with temperatures during the race from the mid 80s at the start to lower 80s by the finish. There will be a south wind at 10 to 15 mph with gusts near 20 mph, which could create a tricky crosswind in turns 3 and 4.
By Doug Schneider
A fairly typical weather pattern for north Texas is expected this weekend as IndyCar moves to Texas Motor Speedway, which should mean dry conditions with warm temperatures for the end of the week.
On Friday there will be a southerly flow in the low levels, which will bring some moisture off the Gulf of Mexico. However, there will be a ridge in the mid and upper levels of the atmosphere, which should provide stable conditions over north Texas that will suppress thunderstorms. There will be a dryline developing over west Texas in the afternoon, but it does not appear that there will be a lot of storms developing along it, and if they do, they will stay well to the west of TMS. I'm not 100% confident that there won't be an isolated storm on Friday evening, but the chances of rain at the track appear too low to mention right now.
I'm more confident that Saturday will be dry, as the atmosphere looks like it will be drier and more stable than Friday. A dry northwesterly flow in the mid and upper levels will continue, and if storms are able to form on the dryline, they will stay well to the west.
The forecast for Detroit this week has been a moving target, but the pattern is starting to come into better focus as we get closer to the weekend. There are still some uncertainties about the timing of rain chances at Belle Isle, but the latest data point toward a better weekend for racing than previously indicated.
Friday looks like a nice day at the track, with mostly sunny skies and highs in the mid 70s. A cold front will be pushing south toward Belle Isle on Friday, but it isn't expected to move across the area until Friday night. The front will have very little moisture to work with, so there may not be any rain with it when it moves through.
High pressure will be building over the area on Saturday, and the front will be to the south of Detroit, across northern Ohio. Most of the day will be very nice, with mostly sunny skies and highs in the mid 70s. However, as a low pressure system approaches from the west, a southerly flow will develop, spreading greater moisture into the area and pushing the front back to the north. While I think the majority of the rain with this will come after Saturday's racing ends, there is some uncertainty about timing, so I have just a 20% chance of rain late in the day, but with very low impact on the IndyCar race at 3:30 pm. No impact is expected for the Trans Am and IMSA races that will be held earlier in the day.
Showers and thunderstorms are likely on Saturday night into Sunday morning as low pressure track east across Michigan, but the big question is, when will it end? There is a lot of uncertainty about this, but what I can say is that conditions should be improving through the day. The most likely sessions to be impacted by rain will be IndyCar qualifying and Trans Am Race 2. It is possible that there could be enough rain to cause some delays to these sessions, depending on how well water drains off the track.There will still be a chance of rain through the afternoon, but the chance will be lower than in the morning. I'd put the chance of rain in the morning at 60%, but closer to 40% in the afternoon. The Stadium Super Trucks and IndyCar Race 2 will probably have a wet track to deal with, but I don't think the conditions at that time will be bad enough to cause major delays or cancellations.
We'll have our live radar feed going through the weekend - just use the Radar link at the top of the website. I'm going on a beach vacation with my family this weekend, so my weather updates on Twitter will be limited, but Scott (@RaceWx4You) will help to keep you informed of the latest weather conditions at Belle Isle.
The forecast graphics for IMSA and Trans Am (Impact level differs based on the timing of races and expected rainfall):
There have been some big shifts in how the models depict the weather pattern evolving over Detroit this weekend. I have very low confidence in this forecast, due to the models changing their tune back and forth between dry and wet. With so much uncertainty, I cannot make the forecast very detailed or specific in regard to timing of rain. But based on the latest model runs, it looks like there will be at least a chance of rain at the track each day. I wish I could make a forecast with greater confidence one way or the other, but sometimes we just have to admit that we don't know what will happen.
The Detroit Grand Prix is always a big event packed with racing action, as IndyCar, IMSA WeatherTech Championship, and the Trans Am Championship will all be racing on the streets of Belle Isle Park. The weather could cause some problems on Friday, but the rest of the weekend is looking good so far.
On Friday, the Detroit area will be in a warm and moist south to southwesterly flow, while a cold front will be pushing south across the upper Great Lakes. In the warm, moist air mass ahead of the front, there will likely be showers and thunderstorms. The question of timing is too uncertain this far out to be very specific, but I think the afternoon will have better rain chances than the morning. At this time, I have the impact on racing as moderate, meaning there will be wet conditions and possibly some delays in the schedule. I could see the impact becoming high with later forecast updates if the rain will be heavy, but that is too uncertain right now.
The cold front will move through Friday night, bringing a drier and cooler air mass to the area from the north. Saturday looks like great racing weather, with mostly sunny skies and highs in the upper 60s.
There is a little uncertainty about Sunday, but I'm going with a dry and mostly sunny forecast. Some previous model runs had shown the cold front lifting back to the north and bringing more rain on Sunday, but the latest models are in better agreement with each other that the front will remain to the south of Detroit. I'll feel more confident in the dry forecast with additional model runs that continue to show this trend.
Here are the forecast graphics for the other series that will be in action at Belle Isle:
The latest model runs are in and I believe that the 101st Running of the Indianapolis 500 will remain dry throughout the entire event. There will be storms during the pre-dawn hours but will be out of the area well before 8AM. The skies will be mostly cloudy throughout the day, but conditions will be favorable for dry weather until around 2PM when a few scattered showers and thunderstorms will begin to develop. I do believe that those will stay west of the track until after the checkered flag falls, but I'm going to leave a 10% chance of a shower reaching the track before the end. It is almost not worth mentioning in the forecast, but this is racing on an oval with slick tires... any moisture could cause a problem. Therefore the 10%. The afternoon high will be around 80 degrees, and winds will be out of the southwest at 5-8 MPH.
Radar is up and running, and you can view it on your smart phone as well. I'm crossing my fingers that the forecast holds up throughout the night. I'll have another update in the AM.
Believe it or not, I think Mother Nature is going to cooperate with us and allow Legends Day today and the Indianapolis 500 tomorrow to go on without any major delay or disruptions. We will have to deal with strong to possibly severe storms tonight through the overnight hours, but those will be gone in enough time for the big race on Sunday.
There should be no problems at all during the day at Indianapolis Motor Speedway as far as the weather is concerned. Skies will be mostly cloudy throughout the day, which will bring a little relief to those who are sensitive to the sun, and the afternoon high will be around 80 degrees. Winds will be light out of the northwest at 1-3 MPH.
As far as tonight is concerned, there is the possibility of some strong to severe storms that could move through the area after 11PM associated with a mesoscale convective system. The Storm Prediction Center has the Indianapolis area in a slight risk for severe storms throughout tonight and into the morning hours on Sunday. The good news is that the storms will be on a weakening trend as they reach Central Indiana, but the threat of damaging winds and hail are still possible. The threat of tornadoes will be rather low, but not zero. Please stay weather aware tonight, especially if you are camping at the speedway.
The line of storms should diminish around sunrise, and much of the daytime hours should remain dry on Sunday at the speedway. There could be an isolated shower or two pop up during the afternoon hours, but a relatively strong cap will be in place keeping any storms from developing. So I'm thinking optimistically and going with the race starting on time and racing to full distance. Skies will be mostly cloudy throughout the day, and the afternoon high will top out around 79 degrees. Winds will be out of the south-southwest to the west-southwest at 5-10 MPH. If a shower pops up and moves over the track, it should not last long and the rain amount will be light. The chance for rain at the track is 20%.
Most of the models are agreeing and keeping Indianapolis dry throughout the day, but the GFS is keeping moisture around. Normally the GFS model is not the best at guessing convective activity, so I'm sticking with the NAM-3k mainly for the forecast. I'm crossing my fingers that I am right.
I think today is going to be a great day in Indianapolis, Looking at the latest HRRR, rain stays away from the area throughout the day, but storms look to move into the area around or just after 7PM tonight and will be quick out of the area around or just after 2AM Saturday morning. There is a potential for these storms to be strong to severe, and the Storm Prediction Center has a marginal risk for severe storms up for the area throughout the day until 8AM Saturday. If you're out and about, or if you're camping out, keep weather aware. For during the daytime hours at the track, there will be no problems. Skies will be mostly sunny, and the high will be around 79 degrees. Winds will be out of the south at 3-6 MPH.
Saturday is going to turn out to be another great day at the track, as skies will be partly to mostly cloudy throughout the day. The afternoon high will be around 79 degrees. Winds will be out of the north-northwest at 2-5 MPH. For the night time hours, there is a slight risk for severe storms in the Indianapolis area, mainly for another line of storms that is expected to move through during the overnight hours around or just after 1AM. The main threats will be from damaging winds and large hail, and there is a possibility for a few tornadoes as well. The latest NAM-3k model run is keeping the storms just south of Indianapolis, but not far enough to be comfortable to say there is no risk. Once again, stay weather aware, especially if you're camping out.
I may have some good news for Sunday for the Indianapolis 500. The latest run of the NAM-3k is keeping the main bulk of the rain and storm activity well to the south of Indianapolis. There will be another wave of storms that will be approaching the area, but it looks like it won't reach the area until well after the race is over. Now I am not ruling out a scattered shower or a brief thunderstorm to move over the track during the day, but as of now, it doesn't look all that bad. So my official forecast would be: Storms ending before 8AM, then skies will be mostly cloudy throughout the day. A passing shower or thunderstorm is possible during the day, but the likelihood of that is small at this point. The afternoon high is expected to be around 77 degrees, and the winds will be out of the south at 5-8 MPH. Chance of rain from 10AM-4PM will be around 20%.
Radar is up and running on the site, so feel free to use it at anytime. It refreshes every 60 seconds, so it will update the latest radar image in from the NWS Indianapolis as soon as it is uploaded. I'll have more updates throughout the weekend, especially on Sunday if rain develops around the track area.
The good news is that I have removed any rain chances out of the forecast for the Carb Day Festivities and the running of the Freedom 100. Skies will be mostly cloudy and the high will top out around 78 degrees. Winds will be out of the south at 3-7 MPH. Storms will move in for the evening, but well after the Steve Miller Band completes their show.
Storms from the overnight and pre-dawn hours should be coming to a end before 8AM when the gates open at the track. Skies will be mostly cloudy throughout the day, as there will be a break throughout the morning into the early afternoon hours. Shower and storm chances begin to rise after 2PM, but just slightly. Good news is that the main bulk of the storms will move in after 8PM, well after the track closes for the day. The afternoon high will top out around 80 degrees, and winds will be out of the south to southwest at 3-8 MPH. The chance of rain throughout the day at the track is 30%.
Here is where we may have some gnashing of teeth due to the weather. Looking at the latest model runs of the NAM and the GFS, there will be moderate to heavy rain/storms throughout the morning hours until 7-8AM. Then there will be a dry slot that opens of for Central Indiana from then until at least 2PM on both models (NAM-left, GFS-right), and the GFS keeps it dry until 8PM. So according to these model runs, the track should be dry for the scheduled race time. Double-checking with the NWS Indianapolis office, there are keeping the rain chances in throughout the day. Even though the amounts will be light, there is a possibility of a few delays. I'm going to side with the NWS right now until I can see when the high-resolution models come in to play. Skies will be mostly cloudy, and there will be a chance of rain throughout the day. The high will top out around 77 degrees, with winds out of the west to northwest at 5-7 MPH. Chance of rain as of now will be at 50%.
Once the timeframe for the high-resolution models come in to play, I can only cross my fingers and hope that the GFS and NAM models are correct. I will be able to nail the forecast down within 24 hours. Radar is up and running, so please feel free to use it and stay up to date with where the rain is happening.
This weekend at the Indianapolis Motor Speedway for the 101st running of the Indy 500 is starting to get that "iffy" look to it. There will be a system moving through the area starting on Friday evening and will not leave until the late afternoon hours on Sunday. We should be able to get the race in on Sunday at full completion, but will we have some delays? That is the main question. Here is the forecast as of now...
The day will start off with mostly clear skies, but clouds will be on the increase during the day. It will be dry during the morning and early afternoon hours, but the chances of an afternoon shower/storm rises to about 1 in 5 for the remainder of the daytime hours due to the approach of an upper wave. Good news is that if any rain occurs, the amounts will be very light, and delays will be short if any at all. Afternoon high will be around 76 degrees, and winds will be out of the southwest to the south at 3-6 MPH.
That upper wave will have the possibility of bringing some strong storms to the area during the evening on Friday into the day on Saturday. An unstable airmass with the wave will allow for robust convection, and the highest threat for strong to severe storms will be across Central Indiana. There will be a wave of storms moving through before 8AM, then a lull in the action until the mid afternoon hours, and scattered storm development picks back up throughout the rest of the day. Too early to know what the strength or what threats will be, but Saturday needs to be a day to stay weather aware. The high will top out around 80 degrees. Rain chances are over 50% to start with, then drop to around 20% during the lull in action, and finish off near 50% for the late afternoon into the night time hours. Rain totals of 1/2 inch will be possible.
As the wave moves through the area, rain and storm chances will begin to drop throughout the day. Skies will start off mostly cloudy, but will begin to clear out some as the afternoon progresses. The high should top out around 76 degrees, with winds out of the west-southwest at 5-10 MPH. Rain chances start off at 40% during the morning, and drops to around 30% by noon. Good news is that if any rain occurs, the amounts will be very light, and delays will be short if any at all.
With ridging in control of Central Indiana's weather, Wednesday at Indianapolis Motor Speedway will be mostly sunny but quite breezy at times. Winds will be averaging between 15-25 MPH out of the south-southwest, but gusts up to 35 to near 40 MPH are possible. Temperatures will be in the upper 70s at 10AM when the gates open, and the high will be around 86 degrees in the afternoon.
An approaching front is expected to stall out in or near the southern part of the state, and this will bring a slight chance of a shower or thunderstorm during the morning through the early afternoon hours. The front may creep ever-so-slowly southward reducing the rain chances for the remainder of the on-track time. Expect a mix of sun and clouds, with winds continuing to be breezy out of the southwest at 10-15 MPH with gust up to 25 MPH possible at times. 10AM temps will be in the lower 70s, and the high will top out around 82 degrees. Chance of rain before 2PM is 30%.
The stalled front will be forced northward during the day on Friday, bringing an increased chance of showers and storms especially during the late afternoon. It will be a mostly cloudy day with much calmer winds starting off out of the northeast and shifting to out of the east-southeast by late afternoon. Temperatures start off in the upper 60s at 10AM, and warming to near 78 for the high. Rain chances are low before 2PM, around 20%, but increase after that to 50%.
A low pressure center will be moving across the upper midwest on Saturday continuing to force the ever-so-slow moving front northward across Central Indiana on Saturday, and will drag a trailing cold front across the area on Sunday. Shower and storm chances appear to be likely throughout the day on Saturday, with rain totals of 1/2 inch possible. Not saying that Saturday is going to be a complete washout, but on-track activities may be halted a few times. Sunday's rain chances are a little lower for "Pole Day," but only slightly. Another day that will have stoppages, but not a complete washout. Saturday's high will be around 81, with Sunday's high cooler, around 75.
Well with today's forecast update for the Indycar Grand Prix at the Indianapolis Motor Speedway, some big changes have been made, but they are ones that everyone will probably like.
There will be a system moving through the area during the overnight and early morning hours on Thursday, and rain chances look to linger into the afternoon hours. Rain will be likely before 10AM, with it dropping to around a 50/50 chance afterwords. There may be a few claps of thunder, but the overall thunderstorm chances look low for now. When it's not raining, skies will be cloudy. Temperatures will start off at upper 50s at 8AM, around 59, and will rise to the upper 60s for the high, around 68 degrees. Winds will be out of the northwest at 3-8 MPH.
Skies will start off partly cloudy but the clouds will be on the decrease throughout the day, as the system that brought rain to the area on the previous days moves farther away. Temperatures will start off in the lower 50s at 8AM, but will rise nicely into the upper 80s for the afternoon high, around 68 degrees. Winds will be out of the north-northeast at 5-8 MPH.
The fair weather will continue into race day at the speedway. The morning will start off mostly clear, with the temperatures in the lower 50s at 8AM. The clouds will build throughout the day, making the skies partly cloudy, but these clouds will not have any rain associated with them. Afternoon highs will top out in the upper 60s, around 69 degrees. Winds will be out of the west-northwest at 3-7 MPH.
I will have radar up and running by tomorrow morning. Check back on our social media feeds and on the site for the latest updates.
At this point leading up to this upcoming weekend's Indycar Grand Prix at Indianapolis Motor Speedway, the forecast is not all that bad at all... but it is way better than last year's event if I remember correctly.
Thursday looks to be a mostly cloudy, if not a completely overcast day, at the track. The latest GFS model is painting moisture in and around the area throughout the day, but the good news is that much of the rainfall will be before the 7AM hour and after the 7PM hour. So much of the day, if not all, will be dry at the Brickyard. I'm including a very small chance of an isolated shower or two to move in or across the area, with the odds of receiving rain at 1 in 5 (20%). If any rain falls, it will not be heavy with totals of less than 1/10th of an inch likely... thunder is not expected at all. Afternoon highs will be in the upper 60s, near 68 degrees. Winds will be light out of the north at 3-6 MPH.
Friday may be the best day of the week, as dry conditions are expected as of now throughout the day. It looks to be a mostly cloudy day, but I wouldn't be surprised if the sun broke through a few times. Afternoon highs will be in the mid 60s, around 65 degrees. Winds will once again be light out of the north-northeast at 3-6 MPH. The odds for rain is not an absolute zero, but the chances are so low that they are not worth mentioning at this point.
Clouds will once again be covering the sky across the Indianapolis area for Saturday, and there is a very small risk for an isolated shower at some point during the day... most likely during the afternoon hours. Odds are better than what they were on Friday, but less than Thursday... so less than 1 in 5 (20%). Rain will be light, if any falls, and totals will be well less than 1/10th of an inch. No thunder is expected at all. Afternoon highs will once again be in the mid 60s, around 65 degrees.
I'll have a better look at the forecast tomorrow, especially with a good look at the high-resolution models when those come in. I will have radar up and running on Thursday. Check back on our social media feeds and on the site for the latest updates.
Not much change at all to the forecast for tonight and tomorrow night out in the desert of Phoenix, Arizona. Afternoon highs for Friday will be just a few degrees cooler than first thought, but 87 degrees for the high is still rather warm. The big story will be the winds today... as winds will be averaging around 20-25 MPH out of the west for much of the remainder of the day, and gusting as high as 40 MPH at times. Those wind gusts are expected to be the highest during the practice session tonight at 4PM through 6PM. There could be some blowing dust at times as well, which could hamper visibility out on the track, along with the handling of the cars. Wind gusts could still be as high as 35 MPH when the series hits the track for qualifying at 8PM. Temperatures will be in the mid 70s at that time.
Cooler temperatures and a little less wind will be the big story for Saturday night for the running of the Desert Diamond West Valley Phoenix Grand Prix. The afternoon high will only reach around 82 degrees, but will drop down to around 79 degrees at 6PM. Winds will be out of the north-northwest, but shifting out of the west-northwest at 10-15 MPH at the green flag, with a few gusts up to 25 MPH possible. The temperatures should drop to around 71-73 degrees by the time the checkered flag flies. Dust should not be an issue.
Doug Schneider and Scott Martin are race fans and meteorologists dedicated to providing accurate forecasts and timely weather updates at racing venues around the world. We forecast for IndyCar, Indy Lights/MRTI, IMSA, Pirelli World Challenge, World Endurance Championship, and Trans Am Series races, as well as major SCCA and NASA events.